posted on 2009-06-29, 16:14authored byKhai S. Lee, Victor Starov, T.J.P. Muchatuta, S.I.R. Srikantha
Surfactants are widely spread in nature and are increasingly used in
industry as wetting, cleaning and disinfecting agents. Recently, there are
newly discovered trisiloxane and other silicone based surfactants which
show very unusual spreading behaviour. Although a number of
experimental and theoretical investigations have been carried out, the
underlying spreading mechanism remains unclear. Experiments using
trisiloxanes and comparison with 3 different ethylene glycol monododecyl
ethers (C12E4, C12E5, and C12E6) surfactants were performed to
understand the influence of Marangoni force as the driving force for the
spreading. We then compared our experimental results to available
theoretical prediction in the literature. The obtained experimental data
showed the opposite trend as compared with the theoretical predictions
developed for a regular surfactants. The latter is assumed to be a special
feature of “suprspreaders”.
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
Department
Chemical Engineering
Citation
LEE, K.S. ... et al, 2009. Spreading of trisiloxanes over thin aqueous layers. Colloid Journal, 71 (3), pp. 365–369